1 // 2004-11-29  Paolo Carlini  <pcarlini@suse.de>
2 
3 // Copyright (C) 2004-2018 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library.  This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
9 // any later version.
10 
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 // GNU General Public License for more details.
15 
16 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING3.  If not see
18 // <http://www.gnu.org/licenses/>.
19 
20 // 21.3.3 string capacity
21 
22 // { dg-options "-DMAX_SIZE=16" { target simulator } }
23 
24 #ifndef MAX_SIZE
25 #define MAX_SIZE 20
26 #endif
27 
28 #include <string>
29 #include <testsuite_hooks.h>
30 
31 // libstdc++/18654
test01()32 void test01()
33 {
34   using namespace std;
35 
36   typedef wstring::size_type size_type;
37 
38 #if _GLIBCXX_USE_CXX11_ABI
39   // Can't shrink below small string size.
40   const size_type minsize = wstring().capacity() + 1;
41 #else
42   // Exact shrink-to-size and shrink-to-fit
43   const size_type minsize = 2 << 0;
44 #endif
45   const size_type maxsize = 2 << MAX_SIZE;
46   for (size_type i = minsize; i <= maxsize; i *= 2)
47     {
48       wstring str(i, L'x');
49       str.reserve(3 * i);
50 
51       str.reserve(2 * i);
52       VERIFY( str.capacity() == 2 * i );
53 
54       str.reserve();
55       VERIFY( str.capacity() == i );
56     }
57 }
58 
main()59 int main()
60 {
61   test01();
62   return 0;
63 }
64